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    <title>Document</title>
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<script>
    // 用函数--封装冒泡排序
    function sort(arr) {
        for (var i = 0; i < arr.length - 1; i++) {
            for (var j = 0; j < arr.length - i - 1; j++) {
                if (arr[j] > arr[j + 1]) {
                    var temp = arr[j];
                    arr[j] = arr[j + 1];
                    arr[j + 1] = temp;
                }
            }
        }
        return arr;
    }

    var arr1 = sort([1, 7, 9, 44, 3, 12])
    console.log(arr1)

</script>